Emboldened by the election result , which saw his party gain 30 seats as the Tories lost their Commons majority, Mr Corbyn said the new-look government could be defeated – triggering a confidence challenge and a new vote.

He said he was targeting the Queen’s Speech – a list of laws the PM hopes to pass – which will be debated at the end of this month.

Mr Corbyn told the Mirror : “I can still be Prime Minister. This is still on. Absolutely.

“Theresa May has been to the Palace. She’s attempting to form a government.

“She’s then got to present a programme to Parliament.

“We will – obviously – amend the Queen’s Speech.

“There’s a possibility of voting it down and we’re going to push that all the way.

“We have a mandate to deal with issues of poverty, justice and inequality in Britain.

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“We want to end austerity and invest in this country and that’s what we’re going to do.

“Nearly 13 million people voted for us to do it. That’s why I’m here.”

Mrs May’s minority government is set to be propped up by Northern Ireland’s DUP.

But former Tory chancellor George Osborne – who was sacked by the PM when she took office – told the BBC’s Andrew Marr she was a “dead woman walking”.

Mr Corbyn said: “I don’t think Theresa May and this government have any credibility.

“The Prime Minister called this election on the basis she would need a stronger mandate to negotiate Brexit.

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“Well look what’s happened. The parallels are with 1974 when the Conservatives sought – as they have done this time – a ‘who governs Britain?’ mandate.

“Ted Heath lost and tried to form another government and tried to get another majority in Parliament.

“And eventually Harold Wilson managed to form a government. She’s taking us back to those times. It’s back to the seventies with Theresa May.”

Mr Corbyn said he was confident he could attract big-hitters who deserted the front bench back into the fold.

He goes on: “Everything’s still to play for. We can still do this.

“My phone is full of texts from lots and lots of people from right across the party.

“I’m very happy about that. I’m very proud to lead this party.

“And I’m open to everyone. It’s important to make that clear.

“I never get involved in personal abuse or anything like that.

“If people have political disagreements that’s fine.

“We can discuss those. I’ll be appointing a Shadow Cabinet over the next couple of days and announcing it next week.

“We’ve got the biggest increase in the Labour vote between elections since the Second World War – we put on more than three million votes.

“We got 40 per cent of the share.

“That was the highest any opinion poll put us on.

“That was people coming back to Labour who had gone away a long time ago.

“And, of course, young people coming together to support us.

“A lot of young people told me they were voting Labour but their family weren’t – so they were working on them.

“There must have been some very complicated discussions around the kitchen table in home after home with young, enthusiastic people saying ‘this is why we’ve got to do it’.

Mr Corbyn goes on: “The number of people who have been involved has been amazing.

“The enthusiasm was infectious and, of course, it infected me as well. It was great. The fundamental message I was putting forward is that we’re strong as a community.

“We didn’t have separate messages – one for the old, one for the young, one for the disabled.

“We had a message of hope. And that was for everyone.

“And that ideal is a basic human condition.

“I’ve worked as hard as I can over the last seven weeks. I know we can do this.”